This project aims to make microwave parametric amplifiers with high gain, large bandwidth, ultra-low noise, and low power dissipation. Our amplifiers are designed to have greatly improved gain characteristics over similar experimental devices. The amplifiers would enable revolutionary astrophysics instruments with far-infrared photon-counting detectors or high-resolution x-ray microcalorimeters.
Our goal is to build microwave amplifiers with near quantum-limited sensitivity, octave or greater bandwidth, gain > 20 dB for signals of frequency 1 – 10 GHz, and power dissipation less than 1 microwatt at a 100 mK operating temperature, or 1 milliwatt at 4 K. Such amplifiers would find immediate application in efforts to develop far infrared instruments based on Microwave Kinetic Inductance Detectors (MKIDs), or in x-ray microcalorimeters with microwave SQUID amplifier (mSQUID) readout systems.
Existing state-of-the-art broadband HEMT amplifiers used so far for MKID or mSQUID readout have noise temperatures about 1 – 10 K. The noise of HEMTs, while low enough for many applications, limits sensitivity of MKIDs. In addition, the power dissipation of cryogenic HEMTs is not as low as desired in a space-based instrument. The new amplifiers in this project would be of great benefit in high performance instrument concepts involving MKID or mSQUID arrays for astrophysics missions.More »
Applicable in ground-based demonstration instruments for astrophysics. Provide lower amplifier noise temperature and lower power dissipation than state-of-the art High Electron Mobility Transistors over a wide bandwidth.More »
|Organizations Performing Work||Role||Type||Location|
|Goddard Space Flight Center (GSFC)||Lead Organization||NASA Center||Greenbelt, MD|
A final report document may be available for this project. If you would like to request it, please contact us.